Metrohm 797 VA Computrace - Manual (Page 108)

5 Determination mode
797 VA Computrace – Software
96
Achtung: Dosino 1..3 refer to Dosinos connected
to the 797 VA Computrace. Dosino 4...7 refer to
Dosinos connected to the 846 Dosing Interface (to
MSB 1...4).
Conc. [ > 0 ; 0 ]
Value for concentration of addition solution.
Unit [ pg/L...g/L ; g/L ]
Unit for concentration of addition solution. With
the CVS or CPVS mode: [ fL/L...mL/L ; mL/L ]
Volume (mL) [ > 0.01 mL / var ; 0 mL ]
Addition volume. For entering variable addition
volumes, click the button to open the
EDIT
VARIED ADDITION window for the selected sub-
stance (details see Variable addition, section 5.2).
In this case,
var is entered into the field instead of
a fixed value. This field only appears once for solu-
tions with the same number (mixed standards)
and it is not displayed if
Batch with solution ex-
change is selected for Technique or if 0 is entered
as solution number.
Click this button to open the CELL CONCENTRATI-
ONS window for entering the concentrations of
the solutions used for standard addition or the re-
cording of calibration curves for the selected sub-
stance (details see Concentrations of calibration
solutions, section 5.2). This button is only dis-
played if
Batch with solution exchange is selected
for Technique .
Regression technique [ see below ; Linear Regression ]
Selection of regression technique:
Linear Regression
The regression is calculated with a straight line.
Nonlinear Regression
The regression is calculated with a nonlinear cur-
ve. This option is only available if
Record calibra-
tion curve , DT Record calibration curve or RC Re-
cord response curve is selected for Calibration .
Linear Regression (through Zero)
The regression is calculated with a straight line
forced to the zero point. This option is only avail-
able if
Record calibration curve , DT Record calibra-
tion curve or RC Record response curve is selected
for Calibration .
Nonlinear Regression (through Zero)
The regression is calculated with a nonlinear curve
forced to the zero point. This option is only avai-
lable if
Record calibration curve , DT Record ca-